// Copyright 2013 Tumblr, Inc.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//     http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

package main

import (
	"io/ioutil"
	"strconv"
	"tumblr/strings"
)

type Filter []int64

func ParseFilter(name string) (Filter, error) {
	raw, err := ioutil.ReadFile(name)
	if err != nil {
		return nil, err
	}
	tokens := strings.SplitTrim(string(raw), " \n\r\t")
	result := make(Filter, len(tokens))
	for i, t := range tokens {
		id, err := strconv.ParseInt(t, 10, 64)
		if err != nil {
			return nil, err
		}
		result[i] = id
	}
	return result, nil
}
